fix(adv-filtering): removed unnecessary imports #6257

Author: igdmdimitrov

projects/igniteui-angular/src/lib/grids/filtering/advanced-filtering/advanced-filtering-dialog.component.ts

@@ -18,7 +18,7 @@ import { takeUntil, first } from 'rxjs/operators';
 import { Subject } from 'rxjs';
 import { KEYS } from '../../../core/utils';
 import { AbsoluteScrollStrategy, AutoPositionStrategy } from '../../../services/index';
-import { DataType, DataUtil } from './../../../data-operations/data-util';
+import { DataUtil } from './../../../data-operations/data-util';
 
 /**
  *@hidden

projects/igniteui-angular/src/lib/grids/filtering/excel-style/excel-style-default-expression.component.ts

@@ -9,7 +9,7 @@ import {
     ViewChild
 } from '@angular/core';
 import { IgxColumnComponent } from '../../column.component';
-import { ExpressionUI, IgxFilteringService } from '../grid-filtering.service';
+import { ExpressionUI } from '../grid-filtering.service';
 import { IgxButtonGroupComponent } from '../../../buttonGroup/buttonGroup.component';
 import { IgxDropDownItemComponent, IgxDropDownComponent } from '../../../drop-down/index';
 import { IgxInputGroupComponent, IgxInputDirective } from '../../../input-group/index';